Q4.(20p) Write a C function void enable_interrupt(int x) that enables interrupt x. You need not check to validate that x is a legal interrupt number. The table below might be useful. Address Name Type Reset Description 0xE000E 100 - NVIC_ISERO RW 0x00000006 Interrupt Set-Enable Registers OxE000E11C NVIC ISER OxE000E180 - NVIC_ICERO RW 0x00000000 Interrupt Clear-Enable Registers 0E000xE19C NVIC_ICER OxE000E200 - NVIC_ISPRO - RW 0x00000000 Interrupt Set-Pending Registers OxE800E210 NVIC_ISPR7 OxE000E280 - NVIC_ICPRO - RW 0x00000006 Interrupt Clear-Pending Register OxE000E29C NVIC ICPR OxE000E400 - NVIC_IPRO - RW 0x00000006 Interrupt Priority Register OxE000E4EC NVIC_IPR59 Q4.(20p) Write a C function void enable_interrupt(int x) that enables interrupt x. You need not check to validate that x is a legal interrupt number. The table below might be useful. Address Name Type Reset Description 0xE000E 100 - NVIC_ISERO RW 0x00000006 Interrupt Set-Enable Registers OxE000E11C NVIC ISER OxE000E180 - NVIC_ICERO RW 0x00000000 Interrupt Clear-Enable Registers 0E000xE19C NVIC_ICER OxE000E200 - NVIC_ISPRO - RW 0x00000000 Interrupt Set-Pending Registers OxE800E210 NVIC_ISPR7 OxE000E280 - NVIC_ICPRO - RW 0x00000006 Interrupt Clear-Pending Register OxE000E29C NVIC ICPR OxE000E400 - NVIC_IPRO - RW 0x00000006 Interrupt Priority Register OxE000E4EC NVIC_IPR59